Sodium Acid Pyrophosphate is a white monoclinic crystal powder. Its relative density is 1.86. It is soluble in water, insoluble in alcohol. It hydrolyzes to orthophosphate when heated in acid medium. It is hygroscopic, forms hexahydrate in damp air, and decomposes to metaphosphate at above 220℃.
Sodium Acid Pyrophosphate
Content (as counted by Na2H2P2O7) ≥% 93.0-100.5 Water Insoluble ≤ % 1.0 pH (1% aqueous solution) 3.5-4.5 Arsenic (As), % ≤ 0.0003 Heavy Metals (as Pb), % ≤ 0.001 Fluoride (F), % ≤ 0.005 Pb % ≤ 0.0002